WO2003101589A1 - Systeme et procede de deshumidification - Google Patents
Systeme et procede de deshumidification Download PDFInfo
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- WO2003101589A1 WO2003101589A1 PCT/JP2003/006543 JP0306543W WO03101589A1 WO 2003101589 A1 WO2003101589 A1 WO 2003101589A1 JP 0306543 W JP0306543 W JP 0306543W WO 03101589 A1 WO03101589 A1 WO 03101589A1
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- gas
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- dehumidifier
- regeneration
- dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
- F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/28—Selection of materials for use as drying agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/34—Specific shapes
- B01D2253/342—Monoliths
- B01D2253/3425—Honeycomb shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2256/00—Main component in the product gas stream after treatment
- B01D2256/12—Oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0216—Other waste gases from CVD treatment or semi-conductor manufacturing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/1032—Desiccant wheel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/1056—Rotary wheel comprising a reheater
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/1072—Rotary wheel comprising two rotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/108—Rotary wheel comprising rotor parts shaped in sector form
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/1084—Rotary wheel comprising two flow rotor segments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2203/00—Devices or apparatus used for air treatment
- F24F2203/10—Rotary wheel
- F24F2203/1088—Rotary wheel comprising three flow rotor segments
Definitions
- the present invention provides a dehumidification system that purifies a gas to be treated by passing the gas to be treated through an adsorbent, removes water, and generates a clean and dry gas having a low dew point, and a dehumidification system using the dehumidification system.
- a dehumidification system that purifies a gas to be treated by passing the gas to be treated through an adsorbent, removes water, and generates a clean and dry gas having a low dew point
- Japanese Patent Publication No. 63-50047 discloses a dry dehumidifier for obtaining dry air having a low dew point.
- This machine has a columnar or cylindrical structure with a large number of parallel gas passages formed by processing special paper mainly composed of activated carbon and ceramic into a single corrugated cardboard shape and winding it in a direction parallel to the rotation axis. It has a honeycomb mouth.
- the honeycomb opening is divided around the rotation axis into a gas passage to be treated, a regeneration gas passage, and a purge gas passage.
- the moisture is absorbed by passing the gas to be treated while rotating the honeycomb opening, and the absorbed moisture is removed by the regeneration gas.
- This device has an adsorbent in which lithium chloride is fixed in the pores of activated carbon to absorb moisture.
- Japanese Patent Publication No. Hei 11-18882224 discloses a dry dehumidification system for obtaining dry air having a low dew point.
- lithium chloride and silica gel are used as adsorbents.
- Zeolite, etc. are shown as examples.
- the mouth is stored in a case that holds the rotor rotatably.
- This rotor and case will be described as an example of the description disclosed in Japanese Patent Application Publication No. 2000-01-2 765552. That is, as shown in FIG. 11 and FIG. 12, the dry dehumidifier 100 is rotated by a holding case 110 having a radially provided partitioning plate 111, and this case 110. It has a mouth 101 that is contained as much as possible.
- the partition 101 With the rotation of the mouth 101, the partition 101 is temporarily divided into the adsorption zone S, the cooling zone T, and the regeneration zone U by the partition plate 111, and one end face of the adsorption zone S ( For example, air to be treated is introduced from the paper side).
- Rho 101 has a plurality of substantially arc-shaped, for example, eight, sectors 102 each made of a honeycomb structure base material 104 and carrying an adsorbent, and these sectors 102 are joined to each other. It is integrated into a cylindrical shape as a whole.
- the sector 102 is reinforced with metal spokes 103, and is further integrated so that the entire outer peripheral surface of the sector 102 is surrounded by a metal outer rim 107. Also, as shown in an enlarged view in FIG. 13, each sector 102, metal spokes 103, and outer rim 107 are joined or bonded by a heat-resistant silicone coking material 120. Have been.
- the moisture in the air to be treated is adsorbed by the adsorbent carried on Rho 101, and clean and dry from the other end of Rho 101 (back side of the paper). Discharged as dry gas.
- the regeneration zone U at Rouen 101 high-temperature air heated to about 180 to 200 ° C was introduced from the end face on the side where clean and dry gas was discharged, By passing through the inside of 101, the water adsorbed in the adsorption zone S evaporates and is removed.
- roasters 101 are exposed to high temperatures, so when moving to adsorption zone S at high temperatures, the dew point rises through the mouth 101 without dehumidifying the air to be treated. Let it. Therefore, a cooling zone T is provided between the adsorption zone S and the regeneration zone U.
- the partition plate 111 that separates the adsorption zone S, the regeneration zone U, and the cooling zone T is provided with, for example, a seal in which a PTFE film is adhered to a fluorine-based rubber. It is slidably pressed to prevent leakage and mixing of the air to be treated.
- the dehumidifier 100 described above there is a limit in reducing the dew point temperature by one step, that is, by itself, and it is usually a two-step type as shown in Japanese Patent Publication No. 63-50047. That is, using two dehumidifiers, the treated air discharged from the adsorption zone of one dehumidifier Is used as a dehumidifier connected so as to be introduced into the adsorption zone of the other dehumidifier. Further, in order to further reduce the dew point temperature, it is considered that three dehumidifying devices are connected in the same manner as disclosed in Japanese Patent Application Laid-Open No. 11-188,224. Various chemicals are used in the manufacturing process of semiconductor devices, and a wide variety of organic compounds are generated in this manufacturing process, from large to small molecular diameter or from low to high boiling point.
- a first object of the present invention is to remove an organic compound simultaneously with moisture absorption.
- high-boiling organic compounds such as gaseous substances such as DMSO (dimethyl sulfoxide), MEA (monoethanolamine), and HMDS (hexamethylene disilazane) are generated.
- these high-boiling organic compounds could be adsorbed by conventional dry dehumidifiers but could not be regenerated. The reason is that in order to remove and regenerate these high-boiling organic compounds from the adsorbent, it is necessary to apply a temperature of about 300 ° C to the adsorbent, and the adsorbent has a heat-resistant temperature. This is because it cannot withstand the temperature.
- activated carbon cannot be used because it has a heat resistance temperature of about 140 ° C and will ignite when exposed to high-temperature air exceeding 300 ° C.
- Silica gel cannot be used because its performance deteriorates if it is exposed to high temperature air exceeding 300 ° C.
- air having a very high temperature of 300 ° C. or more must be introduced.
- the silicone caulk material 120 cannot withstand a high temperature exceeding 200 ° C. For example, if high-temperature air at a temperature of 300 ° C. or more is introduced into the mouth 101, the bonding property of the caulking material 120 provided between the metal spokes 103 and the sector 102 or Adhesion is reduced, and as a result, sectors 102 may fall off and become unusable. On the other hand, since high-temperature air cannot be introduced into the mouth, high-boiling organic compounds are continuously accumulated, and the adsorbing capacity of the adsorbent is also reduced. It decreases along with.
- the temperature of the air passing through the regeneration zone U of the mouth 101 is limited, so that the accumulated high-boiling organic compounds cannot be sufficiently removed, resulting in purification performance and dehumidification.
- the performance deteriorates and the rotor 101 needs to be replaced.
- a method of washing and regenerating Rho-101 with reduced performance has been adopted, but the removal of organic substances, especially high-boiling organic substances, is not sufficient, and the performance of Rho-101 is in the initial state. It cannot be recovered to.
- wastewater treatment after water washing was necessary, which required huge treatment costs.
- a second object of the present invention is to obtain a system capable of regenerating an adsorbent to which a high-boiling organic compound has adhered even at a high temperature of about 300 ° C. Disclosure of the invention
- An object of the present invention is to provide a high-performance, long-life dehumidifying device having heat resistance and a dehumidifying method using the above dehumidifying system.
- the present invention relates to a dehumidification system provided with a dehumidification device for removing moisture and organic substances from a gas to be treated containing moisture and organic substances, wherein the dehumidification apparatus is rotatably supported by the holding case and the holding case.
- a roaster carrying an adsorbent that adsorbs moisture and organic substances is provided.
- the mouth is divided into at least an adsorption zone and a regeneration zone by a partition plate provided in a holding case, and the mouth is covered by the adsorption zone.
- a first supply path for the processing gas and a first discharge path for the gas to be processed are connected, and a second supply path for the regeneration gas and a second supply path for the regeneration gas are connected to the regeneration zone just outside the mouth.
- This is a dehumidification apparatus characterized in that moisture and organic matter adsorbed by the adsorbent in the adsorption zone of the sea are desorbed in the regeneration zone.
- the dehumidification system includes a pair of dehumidifiers, and the first discharge path from the adsorption zone of one dehumidifier is connected to the first supply path of the adsorption zone of the other dehumidifier. And the first discharge path of the other dehumidifier is connected to the target space. Is a dehumidifying device.
- the present invention is characterized in that a gas cooling device is provided between a first discharge path from an adsorption zone of one of the dehumidifiers and a first supply path of an adsorption zone of the other dehumidifier. It is a dehumidifying device.
- the present invention is the dehumidifier wherein the second discharge path from the regeneration zone of the other dehumidifier is connected to the second supply path to the regeneration zone of the other dehumidifier. .
- the present invention is characterized in that a heater is provided between a second discharge path from the regeneration zone of the other dehumidifier and a second supply path to the regeneration zone of the other dehumidifier. It is a dehumidifying device.
- the present invention is the dehumidification system, wherein the gas to be treated is air, oxygen or an inert gas.
- the present invention is the dehumidification system, wherein the regeneration gas is a high-temperature gas heated to 250 to 400 ° C.
- the present invention is a dehumidification system characterized by being divided into an adsorption zone, a regeneration zone, and a cooling zone by a partition plate provided in a holding case in a roaster.
- the present invention is a dehumidification system characterized by having a honeycomb structure having a large number of small through holes therein, and carrying an adsorbent on the honeycomb structure.
- the present invention is the humidity reducing system, wherein the adsorbent has an aluminosilicate in which a part of sodium in the hydrophilic zeolite is replaced with a rare earth element.
- the honeycomb structure of the honeycomb has a plurality of arc-shaped sectors that carry the adsorbent and are connected by spokes, and a heat shield is attached between each arc-shaped sector and the spokes.
- a dehumidification system characterized in that:
- the present invention is the humidity reduction system, wherein the heat shield is made of a silicon nitride plate, an expanded graphite sheet, or a laminate having an expanded graphite sheet and a metal plate.
- the adsorbent structure aMxOy'bNa 2 0 'c A 1 2 0 3' dsi 0 2 ⁇ e H 2 0: is represented by (M a rare earth element), and aMxOy as L a 2 0, N d 2 0 3: C e 0 includes a 3 ⁇ P re O ones of one or more kinds selected from ii, bN a 2
- the Na 2 0 0 comprises a proportion of 5 wt% or less, including the A 1 2 0 3 as cA l 2 0 3 in a proportion of 10-35 wt%, the S i 0 2 as d S i0 2 20 to 80
- the present invention is a dehumidification system characterized in that the gas to be treated contains an organic substance having a melting point of 200 ° C. or more.
- the present invention has a holding case, and a rotatable rotatably supported by the holding case and carrying an adsorbent for adsorbing water and organic substances, wherein the rotor is at least provided by a partition plate provided in the holding case.
- a dehumidification method using a dehumidification system provided with a dehumidification device partitioned into an adsorption zone and a regeneration zone a gas to be treated is supplied to an adsorption zone of a rotor, and moisture and an organic adsorbent in the gas to be treated are supplied. And a step of supplying a regeneration gas to a regeneration zone in the mouth to desorb water and organic substances adsorbed by the adsorbent.
- a dehumidification system includes a pair of dehumidifiers, and a process of introducing a gas to be treated, which has passed through an adsorption zone of one dehumidifier, into an adsorption zone of the other dehumidifier. Introducing a gas to be treated that has passed through the adsorption zone of the device into a target space.
- the present invention when introducing the gas to be treated that has passed through the adsorption zone of the other dehumidifier into the target space, a part of the gas to be treated is supplied to the target space, and the remaining part is heated to reduce the other.
- This is a dehumidification method characterized in that the moisture is supplied to a regeneration zone of a humidifier.
- the present invention is the method for dehumidifying, wherein the gas to be treated is air, oxygen or an inert gas.
- the present invention is the method for dehumidifying, wherein the regeneration gas is a high-temperature gas heated to 250 to 400 ° C.
- the present invention is the method for dehumidifying, wherein the gas to be treated contains an organic substance having a melting point of 200 ° C. or more.
- aluminosilicate in which a part of sodium in a hydrophilic zeolite is replaced with a rare earth element as an adsorbent
- organic substances can be efficiently adsorbed together with water, and the dehumidification performance and purification performance can be improved. And improve.
- two dehumidifiers By connecting so that the gas to be treated discharged from the adsorption zone of one of the dehumidifiers (hereinafter referred to as “pre-stage”) is introduced into the adsorption zone of the other (hereinafter “sub-stage”) dehumidifier A clean and dry gas with a lower dew point can be obtained.
- pre-stage the gas to be treated discharged from the adsorption zone of one of the dehumidifiers
- sub-stage adsorption zone of the other dehumidifier
- FIG. 1 is a schematic diagram showing a first embodiment of a dehumidification system according to the present invention.
- FIG. 2 is a perspective view showing a roaster of the dehumidification device used in the dehumidification system according to the present invention.
- FIG. 3 is a partially exploded perspective view showing a heat insulating structure using an outer peripheral rim provided with a heat shield.
- FIG. 4 is a cross-sectional view taken along line XX of FIG. 2, and is a diagram illustrating a heat insulating structure of a sector joint.
- FIG. 5 is an enlarged perspective view illustrating a peripheral portion of the shielding seal and the sealing device of FIG.
- FIG. 6 shows another example of the heat insulation structure of the sector junction, and is a view similar to FIG. 3 as viewed from the arrow c .
- FIG. 7 shows another example of the heat insulation structure of the sector junction, similar to FIG.
- FIG. 8 is a view taken in the direction of the arrow ( FIG. 8 is a sectional view taken along the line YY in FIG. 2 showing the heat insulating structure around the outer peripheral rim.
- FIG. 9 is another example of the dehumidification system in the first embodiment (adsorption).
- FIG. 2 is a perspective view showing an overall configuration of a zone S, a regeneration zone U, and a cooling zone T).
- FIG. 10 is a schematic diagram showing a second embodiment of the dehumidification system according to the present invention.
- FIG. 11 is a perspective view showing an entire structure including a holding case of a conventional dehumidifying device.
- ⁇ FIG. 12 is a perspective view showing only a mouth of the conventional dehumidifying device.
- FIG. 13 is a diagram for explaining a joining mode of a sector, a spoke, and an outer rim of a conventional dehumidification system. Sun Moon ''
- FIG. 1 is a schematic diagram schematically showing a first embodiment of the present invention
- FIGS. 2 to 8 are diagrams showing a detailed configuration of a dehumidification system, particularly a heat insulating structure.
- the dehumidification system includes a dehumidification device A for removing moisture and organic substances from a gas to be treated containing moisture and organic substances.
- the dehumidifying device A includes a holding case 110 and a port 1 rotatably supported in the holding case 110 and supporting an adsorbent for adsorbing moisture and organic substances.
- the roaster 1 carries the adsorbent as described above, and the roaster 1 uses the radial partition plate 111 provided in the holding case 110 to adsorb the adsorbent zone S and regenerate it. It is divided into Zone U (see Figure 4, Figure 9 and Figure 11).
- Zone U see Figure 4, Figure 9 and Figure 11.
- an inlet pipe 20 for the gas to be treated F is arranged (first supply path), and the other end face ( On the right side of the drawing: hereinafter referred to as the “back side”, an exhaust pipe (first discharge path) 23 having a fan 21 is arranged.
- the gas to be treated F may be oxygen, an inert gas, or the like, in addition to air.
- the gas to be treated F is introduced into the adsorption zone S through the inlet pipe 20 and the adsorbent removes the water and organic matter contained therein. Then, it becomes a clean and dry gas P and passes through the exhaust pipe 23 to the target space such as a clean room (Fig. (Not shown).
- an introduction pipe (second supply path) 25 for introducing the regeneration gas R is arranged on the back surface of the regeneration zone U, and an exhaust pipe (fan 2 (Discharge route) 27 is arranged.
- the introduction pipe 25 has a heater 24 and heats the regeneration gas R to 130 to 200 ° C., and then introduces it into the regeneration zone U. With this high-temperature gas, water and gaseous impurities (organic substances) adsorbed on the adsorbent in the mouth in the regeneration zone U are desorbed and removed from the adsorbent.
- the regeneration gas R that has passed through the regeneration zone U is exhausted (R ′) by the fan 26 through an exhaust pipe 27 arranged on the surface of the regeneration zone U.
- the regeneration gas can be heated to a temperature at which the high-boiling organic compound desorbs from the adsorbent.
- Desorption of high-boiling organic compounds from the adsorbent depends on the operating conditions of dehumidifier A, but the period when high-boiling organic compounds are accumulated by being adsorbed by the adsorbent (about 6 months to 2 years) It is preferable to set the temperature of the regeneration gas to about 250 ° C to 400 ° C and supply the regeneration gas at a passing air velocity of 1 m / s or more. The processing time is about 6 to 15 hours. Appropriate.
- Rho 1 has a plurality of (eight) arc-shaped sectors 2, and these arc-shaped sectors 2, as shown in FIG. Is arranged in a cylindrical shape in the rim 7.
- Each sector 2 is composed of a honeycomb-shaped substrate 4, which carries an adsorbent.
- the adsorbent is capable of efficiently adsorbing organic substances together with water, and it is preferable to use a rare earth element-substituted aluminosilicate in which a part of sodium in the hydrophilic zeolite is substituted with a rare earth element.
- Aluminosilicate Ichito is, ⁇ 2 / ⁇ 1 2 0 3 y S i 0 2 represented by crystalline Aruminokei acid (M: n-valent metal) of x, depending on the difference of y, tunnel structure in the crystal structure (pore diameter).
- M n-valent metal
- aluminosilicate having a structure in which a part of Na is substituted with a rare earth element.
- the rare earth element-substituted aluminosilicate Ichito the structural formula "aMxOy 'bNa 2 0 ⁇ c A 1 2 0 3 ⁇ d S0 2, - eH 2 0 (M: rare earth element)" is represented by.
- M rare earth element
- One or more rare earth elements can be used.
- AMX 0 The y L a 2 0 3, Nd 2 0 3, Ce0 3, Pr 6 O, is preferred, and it is preferable that the content of the rare earth substituted aluminosilicate is 1% by weight or more.
- La 2 0 3 As amoy, it is desirable that the content of 4 to 10 wt% if desired higher adsorption effect.
- L a 2 0 3, Nd 2 0 3, CeO. , Pr 60 i] the upper limit of the content is La. 0 3 In 10% by weight, Nd 2 ⁇ 3, Ce0 3, P r 6 0! At about 5 wt%. Of course, it may be contained at a higher ratio.
- the A 1 2 0 3 as c A 1 2 0 3 comprises in a proportion of 10 to 35 wt%, d S i 0 preferably includes a 2 S i 0 2 at a rate of 20 to 80 wt%.
- La 2 0 3 6 wt%, Na 2 0 3 wt%, Nd 2 ⁇ 3 2 wt%, Ce 0 3 2 wt%, PREO S wt%, A l 2 0 3 27 wt%, S i 0 2 rare earth element substitution aluminosilicate consisting of 58 weight 0/0 is preferable.
- the substrate 4 is preferably formed of inorganic fiber paper in a honeycomb shape because of excellent heat resistance, abrasion resistance and the like.
- a method of supporting the rare earth element-substituted aluminosilicate on the base material 4 for example, a slurry containing a rare earth element-substituted aluminosilicate and an inorganic binder (for example, silica sol) is sprayed or brushed on the base material. 4 (Honeycomb formed body made of inorganic fiber paper) and impregnated and dried.
- the contact surfaces between the adjacent sectors 2, the spokes 3, and the rim 7 are joined via a caulking material 8 made of silicone, preferably a fluoro rubber, and Each joint surface is covered with heat shields 10, 11 made of noncombustible material.
- the heat shields 10 and 11 have properties of heat resistance, heat insulation, abrasion resistance, and solvent resistance. That is, as shown in FIGS. 4 and 5, when the joining surfaces of the sectors 2a and 2b become hot, the caulking material 8 between the spokes 3 supporting the sectors 2a and 2b and the sector 2 becomes high. Heat barrier seals 10, 11 are provided to prevent deformation due to high heat.
- Heat shield seals 10, 1 1 have heat resistance because the heat shield seal itself withstands high-temperature gas of 300 ° C or higher required to evaporate high-boiling compounds, and high-temperature gas of 300 ° C or higher. It has heat insulation to protect the caulking material 8 from In addition, the heat shields 10, 11 require abrasion resistance due to friction with a seal material to be described later, and additionally have solvent resistance to organic components in the processing gas. .
- Non-combustible materials for thermal barrier seals 10, 11 that satisfy these properties can be made of inorganic materials such as silicon nitride, graphite, ceramic paper, felt, etc. It is.
- the heat shields 10 and 11 are made of a non-combustible material and are used in the form of a plate or a sheet.
- the metal spoke 3 is joined or bonded to two adjacent sectors 2 a and 2 b by a caulking material 8.
- a metal mounting plate 9 is welded to the spoke 3 so as to be positioned at right angles, that is, parallel to the end faces M of the sectors 2a and 2b, and a silicon nitride plate as a heat shield 10 is mounted. It is fixed on the plate 9 with screws 13. According to such a configuration, a complicated forming process for directly attaching the silicon nitride plate to the spokes 3 can be avoided, and replacement thereof is also facilitated.
- the width of the silicon nitride plate 10 is wider than the width of the mounting plate 9 appearing at the end face of the base 1, and is drilled at the joint between two adjacent sectors 2a and 2b with the spoke 3 interposed therebetween. It has a lateral width that fits into the recess 14 with a rectangular cross section that extends in the axial direction. As a result, the silicon nitride plate 10 does not protrude from the end surfaces of the sectors 2a and 2b.
- the fact that the silicon nitride plate 10 does not protrude from the end faces of the sectors 2a and 2b is effective in relation to the sealing device attached to the holding case 110 shown in FIG. That is, although the mouth 1 shown in FIG.
- the holding case 110 has the structure shown in FIG. 5 (the shielding seal 10 and the sealing device 52 in FIG. 4). As shown in (enlarged perspective view of the periphery), a partition plate 1 1 1 (see Fig. 10) that divides the roof 1 into each zone is attached.
- a sealing device 52 is attached to the partition plate 111 of the holding case 110, and the regeneration device U, the adsorption zone S, etc. are mounted by the sealing device 52. Each area is divided to prevent gas leakage between the zones.
- the partition plate 1 1 1 has a mounting plate 5 3 for the sealing material 5 5 fixed with nuts 5 4 c
- the sealing material 55 sliding on the rotor 1 is fixed to the partition plate 1 1 1
- the connecting portion 56 is fixed with a nut 54 via a rod member 57.
- the connecting portion 56 is bent at a right angle from the mounting plate 53.
- a spring 58 is interposed between the connecting portion 56 and the sealing material 55 so as to surround the mouth member 57, and thereby the buffering and restoring forces of the spring 58 are used.
- the sealing material 55 is elastically slidable toward the end face M of the rotor 1.
- the sealing material 55 has a cylinder hole 55 a therein, and a locking portion 59 formed at the tip of the opening member 57 is fitted into the cylinder hole 55 a. . Further, the locking portion 59 has a bistone shape which is substantially slidably fitted in the cylinder hole 55a.
- the sealing material 55 used here is required to have heat resistance, wear resistance, and chemical stability. As a material suitable for such a sealing material 55, expanded graphite and graphite are preferable.
- the material of the spring 58 is preferably stainless steel in general, or the product name “Inconel”.
- the sealing device 52 is attached to the partition plate 1 1 1, the sealing material 55 slides on the low end face M. However, as shown in FIG. 1 Since it does not protrude from the end face M, there is no collision with the sealing material 55. For this reason, even if the silicon nitride plate 10 is provided on the end face M side of the rotor 1, the silicon nitride plate 10 can smoothly move without collision with the sealing material 55.
- an expanded graphite sheet 15 can be used as a heat shield instead of the silicon nitride plate, and the expanded graphite sheet 15 allows the spoke 3 and the adjacent sectors 2 a, By covering the caulking material 8 between 2b, the spokes 3 and the caulking material 8 can be prevented from deteriorating.
- a structure in which the metal plate 16 is provided so as to be stacked on the expanded graphite 15 sheet may be employed.
- Graphite sheet 15 has excellent heat resistance. By laminating it on a metal plate 16, it is possible to add high robustness and durability and maintain an excellent heat insulating effect over a long period of time. Can be. Further, the laminated structure can be applied to a heat shield 11 provided on a peripheral portion of the rotor 1.
- a heat insulating material 17 such as a calcium silicate plate is arranged between the mounting plate 9 of the spoke 3 and the silicon nitride plate 10, the heat insulating property can be further improved.
- a heat insulating structure is also taken at the peripheral edge of the sector 2, and a silicon nitride plate, which is a heat insulating seal 11, is attached to the peripheral edge of the metal outer rim 7.
- a silicon nitride plate which is a heat insulating seal 11
- the joint portion is protected from heat by the caulking material 8 being protected by the heat shield 11.
- Protected. it is preferable to provide a metal angle member 12 under the heat shield seal 11 so as to be embedded in the outer peripheral edge of the sector 2. However, only the heat shield seal 11 is provided. May be.
- the heat insulation structure as described above prevents the processing gas and the high-temperature regeneration gas from being directly blown to the joint between each of the sectors 2 and the spokes 3, and also prevents a rise in the temperature applied to the caulking material 8.
- the deterioration of the sealing property or the adhesive strength due to the deterioration of 8 can be avoided.
- the dehumidifying device A can be configured to have a cooling zone T in addition to the adsorption zone S and the regeneration zone U as shown in FIG. 11, and as an example in FIG. 1 schematically shows the entire configuration accommodated.
- the same parts as those described above are denoted by the same reference numerals.
- FIG. 10 is a schematic diagram showing a second embodiment of the present invention.
- the dehumidification system includes a pair of dehumidification devices A and B.
- the first-stage dehumidifier A and the second-stage dehumidifier B are each provided with a holding case 110, and roasters 1A and IB rotatably supported by the holding case 110.
- the adsorption zone S of the former dehumidifier A and the adsorption zone S of the latter dehumidifier B are connected in series, and the dehumidification system is configured in two stages. According to the dehumidification system of the second embodiment, a clean and dry gas having a lower dew point can be obtained.
- the former dehumidifier A has the same configuration as the dehumidifier A shown in the first embodiment, and has a roaster 1a defined by an adsorption zone S and a regeneration zone U. .
- An inlet pipe (first supply path) 20 for the processing gas F is arranged at the front of the adsorption zone S of the rotor 1a, and an exhaust pipe (first exhaust path) 23 is arranged at the rear face. 23 is connected to the adsorption zone S of the dehumidifier B at the subsequent stage via an inlet pipe (first supply path) 23 a, and a cooler 22 is inserted in the exhaust pipe 23.
- an introduction pipe (second discharge path) leading to the exhaust pipe (second discharge path) 33 of the regeneration zone U of the latter dehumidifier B 25 Is connected to the inlet pipe 25, and a heater 24 is disposed immediately before the dehumidifier A. Furthermore, the regeneration zone of the dehumidifier A An exhaust pipe (second discharge path) 27 having a fan 26 is disposed in front of the fan U.
- the downstream dehumidifier B may be the same as the dehumidifier A shown in the first embodiment, similarly to the preceding dehumidifier A.
- the storage case 110 has an opening 1b in which a cooling zone T is defined.
- An inlet pipe 23a connected to the exhaust pipe 23 of the preceding dehumidifier A is arranged on the back side of the adsorption zone S of this mouth 1b, and an exhaust pipe (first (Emission route) 28 is arranged.
- the exhaust pipe 28 is branched, and the desired clean and dry gas P having a low dew point is taken out from one of the branches, and the other is made as a branch pipe 29 and faces the back surface of the cooling zone T of the dehumidifier B. Further, in front of the cooling zone T of the dehumidifier B, a regeneration gas introduction pipe (second supply path) 31 having a heater 30 is disposed toward the front of the regeneration zone U. Further, on the back side of the regeneration zone U of the dehumidifying device B, an exhaust pipe 33 having a fan 32 and communicating with the regeneration zone U of the preceding dehumidifying device A is arranged.
- the mouth la is formed by joining a plurality of arc-shaped sectors having the same adsorbent as in the first embodiment, and each junction has a heat insulating structure similar to that of the first embodiment. Is given.
- High-boiling organic compounds are adsorbed at 1 a.
- Rho 1b may be a rare earth element-substituted aluminosilicate as an adsorbent, but need not be a rare earth element-substituted aluminosilicate, and may be an A-type zeolite, an X-type zeolite, or a Y-type zeolite. It is also possible to use a zeolites such as zeolites or an adsorbent having a hygroscopic property such as activated carbon or virgin gel.
- the treatment gas F is introduced into the adsorption zone S of the dehumidification device A in the preceding stage through the introduction pipe 20, and is dehumidified and purified by the adsorbent carried in the mouth 1a.
- the dew point temperature of this clean dry gas is about 135 ° C.
- the clean and dry gas is cooled by the cooler 22 and then introduced into the adsorption zone S of the dehumidifier B at the subsequent stage, where further dehumidification and purification are performed. It is extracted as clean dry gas P with a low dew point of about 0 ° C.
- a part of the clean and dry gas P having a low dew point is sent to the cooling zone T through the branch pipe 29 and used as a cooling gas.
- cooling zone T The clean and dry gas P is heated to about 130 to 200 ° C by the heater 30 and sent to the regeneration zone U as a heating gas for regeneration, and the moisture and gaseous impurities adsorbed on the adsorbent of the reactor 1b are evaporated. And remove.
- the regeneration gas discharged from the regeneration zone U is then sent out to the regeneration zone U of the preceding dehumidifier A through the exhaust pipe 33 by the fan 32.
- the regeneration gas from the regeneration zone U of the downstream dehumidifier B is heated to about 130 to 200 ° C by the heater 24 and introduced into the regeneration zone U of the previous dehumidifier A. .
- this high-temperature gas evaporates and removes moisture and gaseous impurities adsorbed on the adsorbent of the roaster 1a, and the exhaust gas R 'is exhausted from the exhaust pipe 27. Is done.
- the first stage 1a has a temperature of the regeneration gas of about 130 to 200 ° C as described above while the ordinary dehumidifying apparatus is operating. Desorbs moisture and gaseous impurities (organic substances) adsorbed on the adsorbent, but the high boiling organic compound adsorbed on the adsorbent used in the present invention cannot be desorbed at such a temperature. According to the present invention, since the mouths 1a and 1b have an adiabatic structure, the regeneration gas can be heated to a temperature at which the high-boiling organic compound desorbs from the adsorbent.
- Desorption of high-boiling organic compounds from the adsorbent depends on the operating conditions of the dehumidifier, but when the high-boiling organic compounds adsorbed by the adsorbent accumulate (about 6 months to 2 years) It is preferable to set the temperature of the regeneration gas to about 250 ° C to 400 ° C and supply the regeneration gas at a passing wind speed of lm / s or more, and the processing time is preferably about 6 to 15 hours. It is.
- Paper of 0.2 mm density 0.25 g / cm 3 is produced.
- the obtained base paper is corrugated into a honeycomb shape with a wavelength of 3.3 mm and a wave height of 1.9 mm to form an arcuate honeycomb structure as shown in Fig. 2.
- L a containing aluminosilicate one preparative composition ratio: L a 2 0 3 is 6%, Na 2 0 is 3%, Nd 2 0 3 2% C e 0 3 2%, ⁇ ⁇ 6 0 ⁇ is 2%
- a 1 2 0 3 is 27%
- the inorganic binder (silica gel) to adsorbent S i 0 2 consists of 58%)
- the added slurry was impregnated and dried, and organic matter was removed by firing to obtain an arc-shaped sector 2.
- a caulking material 8 was interposed between the joint surfaces of the sectors 2a and 2b and the spokes 3 and the rim 7, and a silicon nitride plate was attached to the end surface of the spokes 3.
- the heat insulating seal 10 made of was screwed.
- a heat shield 11 made of a silicon nitride plate was attached to the rim 7.
- the above-mentioned mouth 1 was attached to a holding case (not shown) defining the adsorption zone S and the regeneration zone U, and a single-stage dehumidification system ⁇ ⁇ was produced. .
- An A-type zeolite was used in place of the La-containing aluminosilicate as the adsorbent, and an arc-shaped sector 2 was prepared in the same manner as in Example 1, and eight such sectors 2 were joined to form a cylindrical port. Overnight 1 was made. During the joining, a caulking material 8 was interposed between the joining surfaces of the sector 2 and the spokes 3 and the rim 7, but the shielding seal 11 was not used. Then, similarly, a one-stage dehumidification system ⁇ defined in the adsorption zone S and the regeneration zone U was produced.
- NMP N-methyl-2-pyrrolidone
- Typical high-boiling organic compounds generated from solvents used in the semiconductor manufacturing process include MEA, dimethyl sulfoxide (DMSO), hexamethyldisilazane (HMDS), and propylene glycol monoethyl ether acetate. (PGMEA), among which NMP has the highest boiling point of 204 C.
- DMSO dimethyl sulfoxide
- HMDS hexamethyldisilazane
- PGMEA propylene glycol monoethyl ether acetate.
- the NMP removal rate was 99.9% in the dehumidification system II, whereas the NMP removal rate was almost complete. In the wet system 2, the value is as low as 80%. Was. This indicates that the La-containing aluminosilicate according to the present invention has high adsorption performance for high-boiling organic compounds.
- Mouth 1 of the dehumidification system 1 was used as the mouth 1a of the previous stage, and a two-stage dehumidification system 3 shown in Fig. 10 was created.
- an arc-shaped sector 2 was formed using an adsorbent made of X-type zeolite, and eight sectors were joined together to form a holding case 110 as shown in Fig. 10.
- the suction zone S, regeneration zone U and cooling zone T were defined.
- no insulation structure was applied to the second lb of the mouth.
- a two-stage dehumidification system ⁇ ⁇ was prepared in the same manner as in Example 2 except that the low tide 1 of the dehumidification system 2 was changed to the first stage ⁇ 1a.
- the removal rate of high-boiling organic matter in the obtained clean and dry gas was almost equal to that of the above-described dehumidification system I.
- the dew point temperature was -80 ° C.
- the same treatment was performed in the dehumidification system 4, and the removal rate of high-boiling organic matter in the clean and dry gas was almost the same as in the dehumidification system ⁇ ⁇ .
- the dew point temperature was -75 ° C.
- the same purification was performed continuously for 6 months (rotation of roasters for 24 hours) using dehumidification system 3 and dehumidification system 4.
- high-temperature air at 300 ° C was supplied for 12 hours to the first stage of both dehumidification systems 34 for regeneration for 12 hours.
- the organic matter amount, the pore volume, and the specific surface area were measured for the raw material 1a before and after the regeneration.
- the amount of organic matter was determined by cutting out a 10 cm square sample from the mouth 1a and pulverizing the sample, collecting 3 Omg of the sample, and using a thermogravimetric device.
- the pore volume is the volume of pores present in the adsorbent per unit weight (here, l kg), and a sample (2 mm x 10 mm strip) is cut out from the mouth 1a. g It was measured by the BJH (Barpett-Joyner-Halenda) method using elemental gas and converted to a value per lkg.
- the specific surface area is the surface area of the adsorbent per unit weight (in this case, lg).
- a sample (2 mm x 10 mm strip) is cut out from 1 a of the mouth, and 1 g of the sample is collected. And measured by the BET method using nitrogen gas.
- the dehumidification system 3 was disassembled and the first stage 1a was observed. In the dehumidification system 3, no deterioration of the caulking material at the sector joint was observed. Significance was confirmed.
- the present invention it is possible to remove an organic substance containing a high-boiling organic compound, and to obtain a clean and dry gas having a low dew point.
- it has heat resistance enough to withstand high-temperature gas exceeding 300 ° C, Equipped with a renewable structure that removes organic matter, it can perform high-performance and long-life operation.
Description
Claims
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KR1020047019152A KR100912739B1 (ko) | 2002-05-30 | 2003-05-26 | 감습시스템 및 감습방법 |
US10/513,754 US7217313B2 (en) | 2002-05-30 | 2003-05-26 | Dehumidification system and dehumidification method |
EP03730630A EP1508359B1 (en) | 2002-05-30 | 2003-05-26 | Dehumidification system and dehumidification method |
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JP2002-157761 | 2002-05-30 | ||
JP2002157761A JP3482409B1 (ja) | 2002-05-30 | 2002-05-30 | 減湿装置及び減湿方法 |
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PCT/JP2003/006543 WO2003101589A1 (fr) | 2002-05-30 | 2003-05-26 | Systeme et procede de deshumidification |
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US (1) | US7217313B2 (ja) |
EP (1) | EP1508359B1 (ja) |
JP (1) | JP3482409B1 (ja) |
KR (1) | KR100912739B1 (ja) |
CN (1) | CN100354026C (ja) |
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- 2003-05-26 EP EP03730630A patent/EP1508359B1/en not_active Expired - Lifetime
- 2003-05-26 CN CNB038124165A patent/CN100354026C/zh not_active Expired - Fee Related
- 2003-05-26 US US10/513,754 patent/US7217313B2/en not_active Expired - Fee Related
- 2003-05-26 KR KR1020047019152A patent/KR100912739B1/ko not_active IP Right Cessation
- 2003-05-29 TW TW092114603A patent/TW590791B/zh not_active IP Right Cessation
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Publication number | Priority date | Publication date | Assignee | Title |
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US20190154355A1 (en) * | 2016-04-05 | 2019-05-23 | Arvos Ljungstrom Llc | Rotor for a rotary pre-heater for high temperature operation |
US11137217B2 (en) * | 2016-04-05 | 2021-10-05 | Arvos Ljungstrom Llc | Rotor for a rotary pre-heater for high temperature operation |
CN107485961A (zh) * | 2016-06-10 | 2017-12-19 | Se工业株式会社 | 气体精制处理装置 |
Also Published As
Publication number | Publication date |
---|---|
TW590791B (en) | 2004-06-11 |
CN1703266A (zh) | 2005-11-30 |
CN100354026C (zh) | 2007-12-12 |
EP1508359A1 (en) | 2005-02-23 |
US20050172805A1 (en) | 2005-08-11 |
KR20050016446A (ko) | 2005-02-21 |
EP1508359A4 (en) | 2006-10-04 |
EP1508359B1 (en) | 2011-08-10 |
JP3482409B1 (ja) | 2003-12-22 |
KR100912739B1 (ko) | 2009-08-18 |
JP2004000824A (ja) | 2004-01-08 |
TW200400078A (en) | 2004-01-01 |
US7217313B2 (en) | 2007-05-15 |
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